Batteries are an essential part of a vehicle and should not be overlooked. Without a healthy battery, the car stands still. We are responsible for how long they can support our vehicle. To extend their lifespan, we need to properly maintain them. Maintenance free batteries are slowly taking over lead-acid batteries but it is important to understand that the basic principle remains the same. We will discuss all the important aspects of a battery in this article.

How does a battery work?

Lead acid car batteries are energy storing devices made up of lead and lead dioxide plates. These plates are submerged into an electrolyte solution. The percentage of water is 65% and sulphuric acid contributes 35% to this solution. When the battery is used to start the car, it gets discharged. The sulphuric acid in the electrolyte solution gets depleted leaving a higher proportion of water. The sulfate is returned to the acid during the charging process. The battery provides high current required by the starter motor to crank the engine of the car. Once the engine is started, the battery is again recharged by the engine driven charging system. In this process, the alternator takes necessary energy from the rotation of engine through a belt to charge up the battery. When the engine is running, the alternator generates electricity for the electrical equipment of the car.

What makes a battery weak?

When the car is exposed to direct sunlight in summers for longer periods of time, it accelerates the process of corrosion and evaporates the electrolyte. This reduces the life of a battery making it weaker. So, avoid getting your car heated by sunlight by parking in a suitable shade.

A battery must be fitted properly to avoid any sort of vibrations. These vibrations over the time shake the plates around which in turn make the internal connections lose. As a result, the battery would not get properly charged.

Once you start the car, make sure to drive it for enough time for the battery to get recharged again. The alternator takes time to recharge the battery after it has released its energy while starting the engine. Otherwise, the battery will stay undercharged which is not sufficient to provide high current to the starting motor.

Keeping the headlights or music system on while the engine is shut down drains the battery over the time. Avoid plugging in a charger for a longer period of times to prevent the battery from discharging.

Corrosion on battery terminals is as harmful to the battery as anything else. Always clean the battery terminals carefully once or twice in a month. Make sure to wear gloves and eye protection. The white powder on terminals is toxic and should not be allowed to come in contact with the skin.

Signs that indicate battery replacement:

There are a couple of signs that may indicate your battery is getting weak and needs a replacement.

• The bright headlights of the car become slightly dim when the engine is turned off.
• The starter motor turns slowly when you start the car due to the low current provided by the battery.

There are a few visual signs that indicate the battery needs a replacement.

• An internal short circuit or overcharging leads to a swollen battery. If you see signs of bulging anywhere around the battery, replace it.
• Examine the battery case carefully for any damage to the battery case.

How to start an engine with a weak battery?

It is not recommended to use a weak battery. However, in an emergency case, jumper cables can be used when you are stuck during your trip along the roadside. Always keep a set of jumper cables in your car if you think the battery is not in a supreme condition. Jumper cables let you jump start your vehicle with the help of another car. Although it is a very simple technique but safety measures must be taken to avoid any danger. Following steps will guide you to jump-start the vehicle:

• Make sure both batteries have the same voltage rating i.e. 12 V
• Turn off the ignition switch after parking it close enough to the other car in neutral position.
• Never jump a frozen battery. It can easily explode.
• Wear rubber gloves and safety glasses.
• Carefully identify and connect the positive terminals of both batteries to each other.
• Make sure the other end does not touch car’s body to avoid any dangerous spark.
• Clamp the negative cable to the negative terminal of the good battery.
• Connect the other end of the negative cable to a metal part of the car with a weak battery.
• Finally the start the car with the good battery.
• Give it 5-7 minutes to charge the weak battery.
• Now start the ignition of the car with a weak battery.
• Carefully remove the cables in reverse order. Remove the negative cables first followed by removing the positive cable from the car with the good battery. In the end, remove the positive cable from the car with a weak battery.

How to check battery’s health?

For proper maintenance of battery, schedule once a month to check the status of the battery. Nowadays there are tools that can help measure the present condition of the battery. Following are the most commonly used tools for this purpose:

Battery load tester:

Battery load tester is used to check the voltage rating of the running battery. It has a display meter with voltage readings up to 16V along with the battery health indicator. It has positive and negative probes. Inside, there is a high current capacity coil which provides the necessary load with a toggle switch. Battery voltage can be tested easily by following these steps:

• Turn off the car engine.
• Connect the positive probe of load tester with the positive terminal of the battery.
• Similarly, connect the negative probe with the negative terminal.
• Make sure both probes are properly connected with the battery terminals.
• The meter will show a voltage reading in accordance with the health of the battery.
• Now, turn on the load toggle switch for 05-07 seconds to measure the battery voltage on load.
• A healthy battery ideally shows 12.5 volts.
• If the meter needle deflects anywhere near the “weak” indication, immediately replace the battery.
• Safely remove the probes in reverse order.

Hydrometer:

The hydrometer is another tool to measure the battery health. It measures the specific gravity of electrolyte but can only be used on batteries with removable caps. Hydrometers usually have a built-in thermometer. Follow these easy steps to measure the remaining battery life:

• Start with removing caps from the top of the battery.
• Dip the tip of the hydrometer in the first cell of the battery.
• Squeeze and release it from behind to let the electrolyte enter into the cylinder of the hydrometer.
• Read the specific gravity of electrolyte as indicated.
• Note the reading for all cells one by one.
• Make a comparison of readings with those one given on hydrometer.
• Usually, readings between 1.265 and 1.299 indicate towards a charged battery. Any reading under this bracket show signs of a weak battery.
• Another method to examine battery health is to use a multimeter. This process is similar to the one we used for the battery load tester.

How to replace a battery?

A car battery can be easily replaced at home without any complication by following these simple steps:

Removing the old battery:

• Start with removing negative terminal of battery usually marked as black or with (-) symbol to avoid any arcing with the wrench.
• Disconnect the positive terminal usually marked as red or with (+) symbol.
• Remove the “hold down clamp” of battery
• Batteries are heavy in weight so lift it up carefully.
• Clean the battery tray if it is corroded.

Connecting new battery:

• Carefully lift in the new battery in its position.
• Properly connect the “hold down clamp” first.
• Connect the battery terminals in reverse order by connecting the positive terminal first.
• Connect the negative terminal of the battery.
• Make sure the connections are not loose.
• Battery must be fixed properly to avoid any vibrations.
• Terminals must be in a clean condition.
• Add some petroleum jelly on both terminals as it reduces the process of corrosion.

The old battery can be sold to a battery shop from where you have purchased the new one. These car batteries are also recycled to prevent dangerous chemicals from getting into the atmosphere. Old lead plates can also be recycled into various other products.

How to maintain your battery?

To extend the battery life, it should be well maintained. Schedule the maintenance of battery every month. It includes following few things:

Cleaning battery and its terminals:

Cleaning of a battery involves removing the corrosion or any white powder from the terminals and the surface of the battery. For this purpose, use warm water and add a tablespoon of baking soda to it. Carefully remove the battery (as mentioned in replacement section) Make sure the removable caps are properly tight. Always use rubber gloves because the white powder is toxic and should not be allowed to come in contact with the skin. Thoroughly apply the solution over the battery case. Clean the terminals properly. Use a brush to reach narrow spaces. Let the solution for a couple of minutes and then wash it with cold water. The terminals will be corrosion free after this practice. Install the battery back to its position with care.

Inspection of Electrolyte level:

Electrolyte level inside a battery can be examined visually by removing the caps on top of the battery. The lead plates must be dipped properly into the electrolyte solution. If you see a decreased level of electrolyte in any of the cells, add some water into it. Let the solution get mixed properly.

Using a battery charger/maintainer:

If your car is idle for a long period, use a battery charger to keep the battery properly charged. Batteries soon become dead if you don’t charge them. A battery charger can be of great help to keep the desired voltage output from the battery. Usually, it comes in different modes as per requirement i.e. charging, boost charging and maintainer. It can also be used to maintain battery voltage. Carefully plug in the charger into a socket. Connect the positive cable with the positive terminal of the battery and negative cable to the negative terminal. Turn on the switch and let the battery charge properly.

Always inspect the battery before leaving on a trip. Overlooking the condition of battery might bring you trouble in the middle of nowhere. A 10-15 minutes inspection might help you save a lot of time during your journey. If you know any other important aspect related to batteries, do mention in the comments section below.

 

Portable concrete trailer pump, as well known as concrete pump trailer, is composed of pump body and delivery pipe. Portable concrete trailer pump is a kind of concrete pump machine that use pressure to transport concrete continuously along the pipeline. Portable concrete trailer pump is mainly used in the construction of houses, Bridges and tunnels. MINLE brand portable concrete trailer pump is mainly divided into gate valve concrete pump trailer and S valve concrete pump trailer. Large portable concrete trailer pump is widely  used for tall buildings, high-speed, flyover and other large concrete engineering concrete conveying work.

How to use the Portable Concrete Trailer Pump

• The Portable Concrete Trailer Pump should be placed on a solid and flat ground, with the supporting legs down and the fuselage placed smoothly.
• It is should be checked before operation to ensure that the electrical equipment and instruments are normal, the switch buttons and handle of all parts are in the correct position, the fastening points of the mechanical part are firm and reliable, the tightness of the chain and belt meets the specified requirements, and the transmission part operates normally.
• The concrete conveying pipe joints shall be tightly sealed and the pipe clips shall be firmly connected. Vertical pipe should be no less than 10 meters in front of the horizontal pipe with a check valve, it was strictly prohibited to connect the vertical pipe directly to the concrete delivery pump outlet.
• When dredging the blocked pipe, people around should be evacuated. Before disassembling and cleaning the pipeline, backpumping method should be adopted to remove the pressure of the conveying pipeline. It is strictly forbidden to pipe mouth to person when disassembling.
• Please don not remove the hopper grid and other safety devices during operation. Did not climb or ride the conveying pipe,  not put your hand into the valve body to work,  not remove the pipe when pumping.
• When cleaning the pipe, the operator should leave the pipe outlet and bend joint.When cleaning the pipe with compressed air, no one and equipment shall be allowed within 10 meters of the pipe outlet.
• After the operation, unload the hydraulic system and return all the control switches to the original position.

Piping design of Portable Concrete Trailer Pump

The concrete delivery pipe of portable concrete trailer pump shall be arranged according to the characteristics of the project and construction site and the concrete pouring scheme. You should shorten the length of the pipeline, less elbow and hose. The laying of delivery pipe should ensure safe construction, facilitate cleaning pipe, troubleshooting and installation and disassembly maintenance.

Concrete delivery pipes of the same diameter shall be used in the same pipeline. When the new and 1-day sections are adopted at the same time, the new pipe should be arranged at a place with higher pumping pressure. The pipeline should be arranged horizontally and vertically. A schematic drawing of pipe layout shall be drawn, the specifications and quantities of various pipe fittings, pipe connecting rings and elbow pipes shall be listed, and a list of spare parts shall be proposed. The concrete delivery pipe should be selected according to the maximum particle size of coarse aggregate, the type of portable concrete trailer pump, the delivery distance of concrete output, and the degree of conveying difficulty. The delivery pipe shall have a strength suitable for pumping conditions. The pipe section without crack, bump and bend should be used. Pipe joints shall be tight, strong enough to be quickly assembled and dismantled. When the minimum pipe diameter of conveying pipe is l00mm, the maximum particle size of coarse aggregate cannot exceed 30mm, and when the minimum pipe diameter is 125mm, the maximum particle size cannot exceed 40mm. When piping vertically upward, the length of horizontal pipe on the ground shall not be less than 1/4 of the length of vertical pipe, and shall not be less than 15m, or comply with the provisions of the product specification. A globe valve shall be set at the root of the conveying pipe at the y-shaped pipe outlet 3 ~ 6m of the concrete pump to prevent the backflow of concrete mixture. When pumping underground structures, the horizontal pipe axis on the ground should be perpendicular to the y-shaped pipe outlet axis.When inclined downward piping, exhaust valve should be set at the upper end of inclined piping;When the height difference is greater than 20m, a horizontal pipe with 5 times the height difference length should be set at the lower end of the inclined pipe.If the condition is limited, the elbow pipe or ring pipe can be added to meet the requirement of 5 times the height difference length.The fixation of concrete conveying pipe shall not be directly supported on steel bars, formwork and embedded parts. Horizontal pipe shall be fixed with bracket, platform pad and sling at a certain distance, so as to eliminate pipe blockage, install, dismantle and clean the pipe. The vertical pipe should be fixed in the hole on the wall and the column or the roof of the floor with embedded parts.In the wall and column, each section of the pipe should not be less than 1 fixed point, in each floor slab holes should be fixed. A bend at the lower end of a vertical pipe should not be used as a support point for an upper pipe.Suitable for steel support to bear the weight of vertical pipe. When the vertical pipe is fixed on the scaffold, the scaffold can be strengthened as required.There shall be no leakage of slurry at the clamp of pipe joint.In hot season construction, it is advisable to cover the concrete conveying pipe with wet cloth and warm straw bag to avoid sunshine. Construction in cold season, it is advisable to use insulation materials to cover the kungfu soil conveying pipe, to prevent the concrete inside the pipe from freezing, and to ensure the temperature of concrete into the mold.When the horizontal conveying distance is more than 200m, the vertical conveying distance is more than 40m, the conveying pipe is vertically downward or the horizontal pipe is arranged in front of the inclined pipe, when the cement consumption per unit of kungfei soil mixture is less than 300kg/m3, the piping method and pumping process must be reasonably selected, it is advisable to use large diameter concrete conveying pipe and long conical pipe, and less elbow pipe and hose.When the conveying height exceeds the maximum conveying distance of concrete pump, relay pump (successor pump) can be used for pumping.In addition, according to the characteristics of engineering structure, construction technology, cloth requirements and piping conditions, the choice of cloth equipment. The distribution equipment shall be arranged according to the size of the structure plane, the piping condition and the length of the cloth rod, and it shall cover the entire structure plane, and the cloth shall be distributed evenly and quickly. The distributing equipment should be firmly and stably installed.

1.Technical parameters of stationary pump

Stationary Pump had the following main technical parameters such as conveying displacement, export pressure, motor power and distribution valve form. According to the new national standards, these main parameters from the concrete pump model can be learned.

2. Power of electric motor（diesel engine is the same）

The motor power of concrete pump trailer is the precondition to determine the outlet pressure and the amount of conveyor. Under the condition of a certain motor power, the increase of the pressure will reduce the amount of conveyor. On the contrary, reducing the outlet pressure will increase the throughput. In order to ensure that the concrete conveying pump not only has a large amount of conveying, but also has a certain outlet pressure and economic power to match, in the design of concrete conveying pump, the constant power plunger pump is mostly used. That is, after the constant power value is selected, when the outlet pressure rises, the output displacement of the oil pump will automatically decrease to the value corresponding to the power design. If both of them want to achieve high export pressure, and want to get the purpose of large throughput. The only way is to increase the motor power. Therefore, in the new national standard, the concept of capacity index of concrete conveying pump is introduced (taking MPa·m3/h as the measurement unit). the product of the actual outlet pressure of concrete conveying pump and the actual throughput per hour are identified. The larger the value is, the larger the capacity index will be, and the larger the motor power will be. Thus, the purpose of large displacement and high lift can be realized.

Use skills of stationary pump

1. Operators and relevant equipment management personnel shall carefully read the operating instructions and master the relevant knowledge of its structural principle, operation and maintenance as well as pumping concrete operations; The operation of concrete pump should be strictly in accordance with the operating instructions. Since there is required processes for the operator to fully master the mechanical properties, the instruction manual should be prepared at random. At the same time, it should be based on the use of the manual to develop special operating points, to be able to effectively control some variable factors in the pumping technology, such as pump position, pipeline layout.
2. The ground supporting the Stationary Pump should be flat and solid; The whole machine should be placed horizontally and should not be tilted in the working process. The supporting leg should be able to support the whole machine stably and lock or fix reliably. The pump location should not only be convenient for the concrete mixing truck to enter and exit and feed to the hopper, but also be conducive to the pumping distribution pipe and reduce the pumping pressure loss. At the same time, it should be close to the pouring site and convenient for power supply and water supply.
3.  Stationary Pump should be based on the characteristics of the construction site and concrete pouring scheme for piping, piping design to check whether the horizontal conversion distance of the pipeline and concrete pump pumping distance.Piping should be as short as possible, less elbow and hose. Pipeline laying should facilitate pipeline cleaning, troubleshooting and disassembly and maintenance.When the new pipe is mixed with the old one, the new pipe should be arranged at the place with high pumping pressure. In the process of piping, a pipe layout diagram shall be drawn, and the specifications and quantities of various pipe fittings, pipe clips, elbow pipes and hoses shall be listed, and a list shall be provided.
4.  In the process of concrete pumping, with the increment of pump pressure, pumping impact will force pipe moves back and forth, it was not only the pumping pressure loss, and was the connection between pump pipe area was in a state of shock and discontinuous tension, which can lead to the pipe clamp and aprons premature damage, water mud overflow, so the pump must be fixed.
5.  After the connection of the Stationary Pump with the conveying pipe, the concrete pump shall be fully inspected in accordance with the operating instructions of the concrete pump, and the machine shall not be started for empty operation until it meets the requirements.After no-load operation for 10min, check again whether all institutions or systems work normally.
6.  During construction in hot season, it was advisable to cover the concrete conveying pipe with wet straw bag, wet cover cloth and other materials to avoid direct sunlight, so as to prevent the concrete from blocking the pipe due to the rapid loss of collapse.When vertical upward piping was required, with the increase of height, namely the increase of potential energy, there is trend of back flow of concrete. Therefore, horizontal pipes of a certain length should be laid between the concrete pump and the vertical piping to ensure sufficient resistance to prevent back flow of concrete. When pumping concrete in high-rise buildings, pipes shall be arranged vertically upward. At this time, the length of horizontal pipes on the ground shall not be less than 1/4 of the length of vertical pipes.If the required length of water pipe cannot be placed due to the limitation of the site, elbow pipe or hose can be used instead.
   7. During the stationary pump in the cold region in winter, appropriate insulation measures shall be taken, and the concrete conveying pipe shall be wrapped with insulation materials to prevent the concrete inside the pipe from freezing.When vertical upward piping was required, with the increase of height, namely the increase of potential energy, there is trend of back flow of concrete. Therefore, horizontal pipes of a certain length should be laid between the concrete pump and the vertical piping to ensure sufficient resistance to prevent back flow of concrete. When pumping concrete in high-rise buildings, pipes shall be arranged vertically upward. At this time, the length of horizontal pipes on the ground shall not be less than 1/4 of the length of vertical pipes. If the required length of water pipe cannot be placed due to the limitation of the site, elbow pipe or hose can be used instead.

Choose Junhua, Choose the top quality of China!

Concrete delivery pump, also called concrete pump trailer,  has the advantages of fast construction speed, good construction quality, and convenient construction. In actual use, pipe blocking of concrete delivery pump is a common problem which can affect quality and decrease efficiency.  MINLE brand concrete delivery pump system is specially designed and engineered to run smoothly and keep the concrete pipe from blockage.

Why is there a blockage of Concrete Delivery Pump ?

1. Something wrong with material. It mainly includes 3 aspects such as  the segregation of concrete, the particle size of the aggregate is too large, and the remaining amount is not properly controlled.

• In the mixed concrete, the coarse and fine aggregates are not covered with cement slurry, and the cementation effect is insufficient, so the aggregates are more discrete, which may easily cause bleeding. Because no effective lubricating film is formed, the friction between the aggregate and the duct, and the aggregate and the aggregate increases.
• The coarse aggregate configuration is unreasonable. Among them, the larger the particle size, the worse the overall fluidity of the concrete.
• Insufficient control of the remaining material is lower than the stirring shaft, which leads to inhaled air and tube blocking.

2. Something wrong with concrete delivery pump. It mainly includes 2 aspects such as leakage of the delivery pipe and incomplete cleaning of the pipes.

• If the leakage of the pipeline is poor, the leakage of the slurry will cause the poor flowability of the concrete due to the leakage of the cement slurry, and the friction will cause a blockage of the pipe.
• After the previous pumping was completed, the delivery pipe was not cleaned in accordance with regulations, resulting in an unobstructed pipe, which affected pumping.
• Both of these problems are particularly serious at the elbow.

3. Management problems of concrete delivery pump. It mainly include 3 aspects such as too fast, too long intermittent time, insufficient consideration of temperature effects.

• The pump was not properly slowed down during the first pumping, which caused excessive friction inside the catheter and blocked the pipe.
• The intermittent time is too long, which causes the concrete to reach the initial setting state in the duct, which hinders subsequent pumping and leads to blocked pipes
• Insufficient consideration of temperature effects, unreasonable protection of the conduit, resulting in excessive evaporation of water or freezing, leading to blockage.

How to prevent blockage of concrete delivery pump?

1. Carefully selected materials
The amount of cement slurry should be sufficient; the particle size of the aggregate should be strictly screened. The maximum particle size of pebble should be less than 1/3 of the diameter of the delivery pipe, the maximum particle size of crushed stone should be less than 1/4 of the diameter of the delivery pipe, and the sand content should be greater than 40% The amount should be sufficient and kept above the stirring shaft. Pay attention to check the slump of the concrete. Those who are unqualified must use it after second mixing. Generally, it is 8-18cm, and it is generally 15cm when the distance is long and the height is large.

2. Strictly controlled of concrete delivery pump

When pumping, set up a special person to inspect the leak tightness of the catheter, and immediately find and repair the leak. When the pumping is finished, you must clean the catheter and set up a special person to inspect and supervise. Before each pumping, check whether the delivery pipe is unobstructed. Try to avoid blockage at the elbow.

3. Strict management

Pump down slowly for the first time, and speed up properly after normal pumping. Generally, the pump is turned on every 5 minutes to prevent pipe blocking during intermittent periods. Concrete that has reached the initial setting state cannot be pumped. Cover the straw bag outside the duct to control the temperature and water in summer Cool down and cover insulation in winter.

for more information please check here
Choose Junhua, Choose the top quality of China!

Velkommen til Bloggers Delight. Dette er dit første indlæg. Rediger eller slet det og begynd så at blogge!